Pellegrino: Didn't we sign him for 6 months only? Although I wouldn't mind keeping him for a longer time, because he's in my opinion a good squad player & has experience
Morientes: He's been there, done that, he'll play much better once he's settled in, very good signing
Garcia: Same SM ^^
Alonso: One of our most imprtant players this season, we need him as he's a great passer of the ball & controls the midfield quite well
Josemi: Squad player, nothing more
Nunez: If consistently has the same performance as he did vs. Everton, then he should certainly stay, keep him at least until the end of the season, if goes back to his mediocre displays, sell him (if anyone was interested)
Carson: Sounds & looks like a player with bags of potential, hope he doesn't turn into another Kirkland, although I believe he's to be much better, good for the future.
Ps. He made a bad mistake that led to a German equaliser in a recent Euro under-21 qualifier, but I don't think it'll stop him & his potential